Extrusion die for alimentary pastes



July 19, 1955 F. D. FEMINA EXTRUSION DIE FOR ALIMENTARY PASTES Filed July 10, 1955 INVENTOR BY QW J3 ATTORNEY United States Patent Ofiice 2,713,313 Patented July 19, 1955 EXTRUSEGN DIE FOR ALIMENTARY PASTES Felice Della Femina, Brooiriyn, N. Y., assignor to V. La Rosa & Sons, Inc., Brooklyn, N. Y., a corporation of New York Application July 10, 1953, Serial No. 367,232

3 flaims. (Cl. 167-14) This invention relates to an extrusion die for alimentary pastes.

An important object of this invention is to provide an extrusion die of the above character capable of producing ribbons of dough-like material which are subsequently cut into lengths to form lasagna, a product of the macaroni family, as shown in the design patent of Stefano La Rosa, No. 168,054, granted October 28, 1952.

Other objects and advantages will be apparent from the following detailed description of a preferred embodiment of the invention, reference being made to the accompanying drawing in which:

Figure 1 is a plan view of the inner or pressure face of an extrusion die;

Figure 2 is a plan view of the outer face of the die of Fig. 1;

Figure 3 is a transverse cross-sectional view of the die taken on the line 3-3 of Fig. 1;

Figure 4 illustrates a fragmentary portion of lasagna capable of being produced by the die; and

Figure 5 is a perspective view of the die with parts broken away to show the interior of the extrusion slot.

The extrusion die shown in the figures of the drawing comprises a disk 1 adapted to fit the discharge opening of a pressure chamber, not shown, in which a supply of alimentary paste is confined.

The disk 1 is provided with an elongated extrusion slot 2 comprising a generally rectangular inlet orifice 2a opening through the inner face of the disk and a generally rectangular outlet orifice 2b opening through its outer face, the gap of the inlet orifice 2a being somewhat greater than that of the outlet orifice 2b. Thus, the paste in passing through the die is more or less compacted between the parallel upper and lower walls and 2d respectively of the slot. The end walls of the slot are rounded and tapered as indicated at 3 and the width of the inlet orifice 2a is slightly greater than that of the outlet orifice 2b, as best shown in Figure 1.

A short distance inwardly of the inlet 2a are two pairs of lugs 3, the lugs of each pair projecting from the top and bottom walls of the slot in vertical alignment so as to produce a restricted passage 22 between the opposed flat faces of the lugs. The ends of the lugs are oppositely inclined, as indicated at 3a. The pairs of lugs are laterally spaced from each other and terminate a short distance inwardly of the end walls of the slot, as best shown in Figure 1.

Corresponding lugs of the pairs of lugs 3 laterally abut ledges 4 which ledges extend longitudinally across the top and bottom walls of the slot and together define the opposed faces of the outlet orifice 2b. These ledges are of a height as to project a slight distance perpendicularly beyond the lugs and are provided at spaced intervals with notches 5, here illustrated as of semicircular cross-sectional shape, the notches upon one ledge being located in laterally offset relation to the notches in the companion ledge. These notches are tapered along their bottoms so as to extend from the fiat surfaces of the ledges 4, to the outer face of the die.

By reason of the construction just described, the paste in passing through the extrusion slot is compressed between the opposed walls of the slot and emerges as a ribbon L, or lasagna, having the form illustrated in Figure 4. By reason of the notches 5 in the ledges 4, the lasagna is provided upon its opposite faces with laterally oifset, longitudinally-extending ribs R corresponding in cross-section to the shape of the notches. The ruffles or undulations U along opposite longitudinal edges of the lasagna are imparted by the squeezing of the paste through the restricted passage 2e between the flat faces of the lugs 3 which serves to retard the flow of the paste adjacent but a short distance inwardly from its marginal edges. Lasagna of the form illustrated in Figure 4 constitutes the subject of an application Serial No. 305,731, of Stefano La Rosa, filed August 22, 1952 now Patent No. 2,686,720, dated August 17, 1954.

It will be apparent that various changes in structure, arrangement, and design may be made without departing from the spirit of the invention as defined by the following claims.

I claim:

1. A die for extruding ribbons of alimentary pastes having an elongated slot extending therethrough and opening through one face of the die to define an inlet orifice and opening through the other face of the die to define an outlet orifice, the gap of the inlet orifice being slightly greater than the gap of the outlet orifice, a pair of opposed lugs upon opposite walls of said slot in approximate registry and defining a restricted passage therebetween for the flow of an alimentary paste and terminating a spaced distance inwardly of the end walls of the slot, a pair of ledges upon opposite walls of the slot arranged in vertically opposed relation and extending from said lugs to the outer face of the die to restrict the passage of paste through the outlet orifice, the ledges being of slightly greater height than the lugs to form a projection rearwardly of said lugs, and a series of spaced-apart notches upon the opposed faces of said ledges.

2. A die as set forth in claim 1 wherein the notches upon one of said ledges are located in laterally offset relation to the notches upon the other of said ledges.

3. A die as set forth in claim 1 wherein said pair of lugs are provided adjacent each end of the slot and the notches upon one ledge are located in laterally offset relation to the notches upon the other ledge.

References Cited in the file of this patent UNITED STATES PATENTS 1,959,006 Penza May 15, 1934 2,045,421 Tanzi June 23, 1936 

